The 29-year-old was named in the Great Britain side to travel to Spain next month after his victory in the 60m in a world-class time of 6.56seconds at the trials in Sheffield at the weekend.

However, UKA had already stressed they did not want Chambers to represent Great Britain and issued a strongly-worded statement when they announced the first wave of selections.

In 2004 Chambers was handed a two-year worldwide ban after testing positive for 'designer steroid' tetrahydrogestrinone (THG). He has not undergone drug testing since November 2006 after a spell with gridiron club Hamburg which led to UKA chief executive officer Niels de Vos claiming Chambers should be barred.

The UKA statement read: "The committee was unanimous in its desire not to select Dwain. Unfortunately, the committee felt that the selection criteria pertaining to the winner of the trials, coupled with the manner of Dwain's performance, left them no room to take any other decision.

"Taking him to the World Indoors deprives young, upwardly mobile committed athletes of this key development opportunity.

"Our World Class Performance Programme (WCPP) is focused on achievement at Olympic and World level.

"On this basis, it is extremely frustrating to leave young athletes at home, eligible for Beijing, in possession of the qualifying standard and committed to ongoing participation in a drug-free sport."

"In contrast, we have to take an individual whose sudden return... suggests that he may be using the whole process for his own ends."

Performance director Dave Collins insists UKA have not bowed to the pressure of a potential legal battle and was adamant memories of the costly court action with Diane Modahl which bankrupted the sport a decade ago, had not been an issue when they selected the drug cheat. Yet Collins is not convinced of Chambers's commitment and believes he may return to play American football.

"I'm delighted by the decision that was made," said Chambers, knowing his only other option of gaining a place was through lawyers claiming his non-selection was "restriction of trade."

Chambers last ran for his country in the 2006 European Championships 4x100m gold medal winning side.

Chambers will not be at this Saturday's Norwich Union Grand Prix in Birmingham because Fast Track, who organise the meeting, have taken the decision that his appearance would not benefit the event.

Also selected in the first wave for Valencia is Richard Buck, the 21-year-old 400m runner from York who set a new personal best of 46.35s in the final to cement his place in the squad, and Middlesbrough long-jumper Chris Tomlinson.

Sheffield multi-eventer Jessica Ennis has not yet been selected, although she is expected to be in the second wave announced on February 26.